/* Arithmetic problem with 1 operator */
#individualEquation[data-nmrofops="1"] {
  font-size: 4em;
}
/* Arithmetic problem with 2 operators */
#individualEquation[data-nmrofops="2"] {
  font-size: 3.4em;
}
/* Arithmetic problem with 3 operators */
#individualEquation[data-nmrofops="3"] {
  font-size: 2.8em;
}
/* Arithmetic problem with 4 operators */
#individualEquation[data-nmrofops="4"] {
  font-size: 2.4em;
}

#individualEquation span.operator, #individualEquation span.equalitySymbol {
  margin-left: 0.4em;
  margin-right: 0.4em;
}
#individualEquation input[type=number] {
  width: 1.5em;
}

